MTN “customer care”

I’ve been receiving invoices via email from MTN that do not belong to me. I am not a customer and therefore contacted their customer service to notify them of this, as it seems this person using my email address is signing up quite a a few phones since this started a few months ago. Mtn service centre have been useless is trying to resolve or investigate. I went into a supposedly flagship store in pavilion and they couldn’t verify anything. I’ve sent emails to their service centre and each “customer care” consultant asks for something different every time. This experience reminded why I left mtn many years ago. They may be well priced but are extremely useless with service and customer care. Even in this case where it seems something fishy is going on they clueless in how to investigate or resolve.